CVE-2025-25226: Joomla! SQL Injection Vulnerability

CVE-2025-25226 Overview

CVE-2025-25226 is a SQL Injection vulnerability affecting the Joomla framework's database package. The vulnerability exists in the quoteNameStr method due to improper handling of identifiers, which could allow attackers to manipulate database queries. Notably, the affected method is a protected method with no direct usages in the original 2.x or 3.x branch packages. However, classes extending the affected database class may be vulnerable if they utilize the quoteNameStr method in their implementations.

Critical Impact

This SQL Injection vulnerability could enable unauthorized database access, data exfiltration, or data manipulation on Joomla-based applications using custom extensions that extend the core database class and call the vulnerable quoteNameStr method.

Affected Products

• Joomla! CMS (versions utilizing the vulnerable database package)
• Custom Joomla extensions extending the core database class
• Third-party plugins calling the quoteNameStr protected method

Discovery Timeline

• April 8, 2025 - CVE-2025-25226 published to NVD
• June 4, 2025 - Last updated in NVD database

Technical Details for CVE-2025-25226

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection) and affects the quoteNameStr method within Joomla's database package. The core issue stems from improper handling of identifiers when constructing SQL queries. While the vulnerable method is protected and not directly exposed in the original Joomla codebase, the risk emerges when third-party extensions or custom implementations extend the database class and utilize this method.

SQL Injection vulnerabilities of this nature typically allow attackers to inject malicious SQL statements through user-controlled input that is improperly sanitized before being incorporated into database queries. The network-accessible nature of this vulnerability means exploitation can occur remotely without requiring user interaction or prior authentication.

Root Cause

The root cause lies in the insufficient sanitization and validation of identifier names within the quoteNameStr method. When this protected method processes identifier strings (such as table or column names), it fails to properly escape or validate special characters that could be used to break out of the intended SQL context and inject arbitrary SQL commands.

Attack Vector

The attack vector for CVE-2025-25226 requires a Joomla installation with custom extensions that extend the core database class and call the vulnerable quoteNameStr method with user-controlled input. An attacker would craft malicious input containing SQL injection payloads targeting the identifier handling logic. Since this is a network-based attack requiring no privileges or user interaction, successful exploitation could lead to complete database compromise.

The vulnerability mechanism involves improper identifier quoting in the quoteNameStr method. When custom code passes unsanitized user input to this method, an attacker can escape the identifier context and inject arbitrary SQL commands. For detailed technical analysis, refer to the Joomla Security Advisory.

Detection Methods for CVE-2025-25226

Indicators of Compromise

• Unusual database query patterns containing malformed identifier names or SQL syntax in application logs
• Unexpected database errors or exceptions related to quote parsing or identifier handling
• Evidence of data exfiltration or unauthorized database modifications
• Web application firewall (WAF) alerts for SQL injection patterns targeting Joomla endpoints

Detection Strategies

• Implement application-level logging to capture all database queries involving custom extensions that extend the core database class
• Deploy SQL injection detection rules in WAF or IDS/IPS systems monitoring for characteristic injection patterns
• Review custom Joomla extension code for any calls to the quoteNameStr method with user-supplied input
• Monitor database audit logs for unusual query patterns or unauthorized data access

Monitoring Recommendations

• Enable verbose database query logging for Joomla applications during the vulnerability assessment period
• Configure alerting for SQL syntax errors that may indicate injection attempts
• Establish baseline database activity patterns to detect anomalous query behavior
• Monitor network traffic for suspicious payloads targeting Joomla database endpoints

How to Mitigate CVE-2025-25226

Immediate Actions Required

• Audit all custom Joomla extensions and plugins that extend the core database class for usage of the quoteNameStr method
• Apply the security patch provided by Joomla as soon as available
• Implement input validation and parameterized queries in any custom code utilizing database identifiers
• Deploy web application firewall rules to block common SQL injection patterns

Patch Information

Joomla has released a security advisory addressing this vulnerability. Organizations should review the Joomla Security Advisory for official patch information and update guidance. Apply all security updates to the Joomla framework and database package as soon as they become available.

Workarounds

• Avoid using the quoteNameStr method with any user-controlled input in custom extensions until patched
• Implement strict input validation and allowlisting for any identifier names that must be dynamically constructed
• Use parameterized queries and prepared statements as an additional layer of protection
• Consider temporarily disabling or restricting access to custom extensions that may be affected until code review is complete

# Joomla database identifier sanitization check
# Search for potentially vulnerable method calls in custom extensions
grep -r "quoteNameStr" /path/to/joomla/plugins/ /path/to/joomla/components/
# Review any matches for user input handling before updating